Improvement in the mantjfaotuee of eaevestee guaed-fingees



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Fly, y E J h f Inventa. Wammes. M/ y MW@ @M N PETERS. PHOWLIYNOGRAFNER WASNINGYOII D C @ni-teh taire /gatw't @frn WILLIAM N. WHITELY, JR., JEROME EAssLER, AND o. S. KELLY, 0F SPRINGFIELD, 0R10.

Letters. Pam No. 65,977, data-1.71m 1s, 18er.

IMPROVEMENT IN THE MANUFAGTURE 0F HARVESTER GUARD-FINGERS.

@tigt .Sannita referat tu itt tiger tttnrs thitntt mit iin-thing part nt tlg-e simu,

T0 ALL WI'IOM IT MA1 CONCERN:

Be it known that we, WILLTM `N. WIHTELY, Jr., JEROME FAssLER, and O. S. KELLY, of Springfield, in the county of Clark, and State of Ohio, have invented a new and useful Improvement in the Manufacture of Guard- 'Fingers for Harvesters; and we do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, inmwhich- Figures 1, 2, 3, 4, and 5 exhibit the different stages of manufacture.

Our ,invention consists of a peculiar order and process of manufacture Vin making guard-fingers for -har' vesters, whereby many advantages are secured, and a much better article is produced than any hitherto in use.

1. Our guard-fingers are first forged in the form shown in fig. 1, being a rough blank of the finger.

:2. This blank is th'en set in the milling machine, and the surfaces A B and shoulders-@Dare rendered smooth and true, as it is desired to have them. The surface A rests against the under side of the {inger-bar, Vandl the shoulder D against the front edge of the nail-rod. These are shown in red in iig. 5.

3. When the second operation has been completed, the slot E, for the passage of the cutters, is sawed in the solidmetal, as shown in tig. 3.

4. '.Lhe blank is new placed in the drill-press, a proper gauge being employed which insures the drilling of the holes F Gr H unifermlyn the proper places.

5. The blank is new placed in the hands of the grinder who reduces it t0 its proper forni and proportions,

as shown in lig. 5. Up te this point the guard-finger has been left in the softest condition possible, so as to facilitate the work of bringing it to the proper size and form.

(i. The fingers are next packed in an iron box in companyy u'ith u suiiicient quantity of pounded charcoal. The cover of the box is luted on with clay, and the whole bex and its contents are submitted to a high heat ina furnace during a period of about twelve hours, at the end of which time the entire .surface of the guardfingers has been converted into steel, and may new be hardened and polished, after which they may be riveted to the finger-bar and nail-rod. The guard-fingers may he subjected to this same process, and with the same improvement, when they are made of cast iron and made malleable.

The advantages of this. process and order of manufacture are, that the guard-iingersl are thusl made duplicates of each other, so that ,they are perfectly interchangeable, and further, they are made more ,durable and strong than any guard-lingers over hithertohmade, for the reason that the whole outer skin or surface is converted into steel and hardened,-while the core er interior portion remainsof iron, possessing great-er strength to resist shocks. We are aware that guard-fingers have been made of iron cast over a chill to render them hard, but thesc are only hard in the slot, and are very brittle and liable to be breken. XVe are also aware that a hardened steel plate has been inserted, against which the knife should cut, but this is expensive, and the top of the slot is not hardened. But We are not aware that guard-tingers have'e'ver been made with an interior orpcore of iron, andthe entire outer surface ofvsteel. If it is desired that the surfaces of the holes should not be hardened; they may Vbe stopped with clay before carbonizing.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l.A Guard-fingers for harvesting machines made by the process and order of manufacture herein described.

. A harvester guard-finger composed of a central portionpor core of soft iron, and its entire outer skin or surface of hardened steel, substantially as and for the purpose 'set forth.

WM. N. WHITELY, JR.,

. JEROME FASSLER,

Witnesses: O. S. KELLY.

S. D. CARPENTER. Guo. ARTHUR. 

